How use PW2_PG_RETENTION_DAYS

[sgnatjuk]

Hi!
If possible, a small question on PGWATCH2 - Postgresql
PGWATCH2 - Running in Docker:

-p 3000:3000 -p 8080:8080 -p 5432:5432
-e PW2_TESTDB=true
-e PW2_PG_RETENTION_DAYS=1
-v "/home/pgwatch2_data/pgwatch2/persistent-config":/pgwatch2/persistent-config
-v "/home/pgwatch2_data/postgresql":/var/lib/postgresql
-v "/home/pgwatch2_data/grafana":/var/lib/grafana
-v "/home/pgwatch2_data/etc/postgresql/postgresql.conf":/etc/postgresql/15/main/postgresql.conf
-v "/home/pgwatch2_data/etc/postgresql/pg_hba.conf":/etc/postgresql/15/main/pg_hba.conf
-v "/home/pgwatch2_data/etc/grafana/grafana.ini":/etc/grafana/grafana.ini
cybertec/pgwatch2-postgres:latest

Question on -e pw2_pg_retention_days = 1
1.
How to realistically check the work of retention
So far I do this way:
\ c pgwatch2_metrics

SELECT DISTINCT DATE (TIME) AS DATE
From public.stat_activity
Order by Date;

If in the Buddhile database, then after installing PW2_PG_RECTION_DAYS = 1
Will old records be deleted? Does this apply only to new ones?

Is the Go script that can delete the data over a period of time,

And most importantly, is there any documentation on retention? Because the official is very swampy.

Thank you, and I hope for help.